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What to look for first 95 Merc Grand Marquis
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Big John
Anonymous Poster
Jpanosh@gmail.com
Jan 8, 2009, 6:07 PM
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What to look for first 95 Merc Grand Marquis
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I have a 95 Merc Grand Marquis, 4.6 V8 with 82,000 miles, in the 30 MPH range B4 it would shift down it develops what seems like a miss, when you give it more power you can accelerate right out of it. I've changed plugs and found a few wide gaps with one real wide but the new ones didn't help. what to look at first: coils, wires, injectors,fuel filter, or maybe transmission? Hope I explained this clearly
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dmac0923
Enthusiast
Jan 8, 2009, 6:54 PM
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Re: What to look for first 95 Merc Grand Marquis
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i would have changed the wires with the plugs, but continue your path down the general tune up, all filters fluid changes. then take it from there
no check engine lights???
__________________________________________________
2015 Jeep Grand Cherokee
2002 Ford Ranger
2004 Toyota Corolla
1969 Ford Mustang Mach 1
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Loren Champlain Sr
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Jan 8, 2009, 6:56 PM
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Re: What to look for first 95 Merc Grand Marquis
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Of course, I'd look at secondary, first. i.e. wires. You can check them with an ohmeter. Also, a light spray of water in a darkened area might show an arc to ground. Or, is this coil over type? Hmmmm. Can't remember.
Loren
SW Washington
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way2old
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Jan 9, 2009, 4:50 AM
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Re: What to look for first 95 Merc Grand Marquis
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If the plug wires do not fix it (they probably will)---------Does it feel like a miss, or a rumbling noise? If it is more of a rumble, that is torque converter shudder. Cheap fix for it is to add a bottle of anti-shudder additive. It works if the shudder is the problem.
Being way2old is why I need help from younger minds
(This post was edited by way2old on Jan 9, 2009, 4:52 AM)
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Tom Greenleaf
Ultimate Carjunky
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Jan 9, 2009, 4:53 AM
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Re: What to look for first 95 Merc Grand Marquis
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Big John:
To add to the good suggestions - how did all the plugs compare with each other? They tell a tale on their own by color and the odd gaps suggests they weren't right to begin with or suffered way too long with a problem.
This should have regular but expensive plug wires with long insulated ends down to the plugs that car arc inside unseen causing misfire - you might even hear it!
If no CEL yet try some injector cleaner too in fuel and no harm in a good professional injector cleaning.
I'm a bit surprised new plugs didn't show improvement if old ones were so bad??
T
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Big John
Anonymous Poster
Jpanosh@gmail.com
Jan 9, 2009, 7:32 PM
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Re: What to look for first 95 Merc Grand Marquis
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Well it's fixed! I had the local NAPA auto parts store order me a tube of Dr. Tranny's Shudder Fixx for six dollars and change, squeezed it into the dip stick tube and took a drive to mix it in. After 5 miles or so I can truly say no more shudder! how long the fix will work I don't know but it's like a miracle.
I would also like to know if Ford has made any recommendations to use one of the newer versions of ATF than the originally specified Mercon, maybe Mercon V ?
John
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Big John
Anonymous Poster
Jpanosh@gmail.com
Jan 10, 2009, 2:56 PM
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Re: What to look for first 95 Merc Grand Marquis
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way2old
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Jan 10, 2009, 3:13 PM
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Re: What to look for first 95 Merc Grand Marquis
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Ford does not recommend changing fluids. Hoewver they do approve of going up in grades. Such ad from Mercon > II >III > IV > V. So as long as you are going from older fluids to newer, things will be OK. However, going from Mercon V to an oloder fluid is not recommend.
Being way2old is why I need help from younger minds
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